Muscles of the Hip and Pelvis ACTION Flashcards
What are the actions of psoas major?
flexion at hip jt
if thigh fixed, flexes trunk
What are the actions of psoas minor?
weak flexor of the trunk
What are the actions of quadratus lumborum?
lateral flexion of vertebral column
extension of vertebral column
stabilizes 12th rib during inspiration
depresses 12th rib during forced expiration
elevate coxal bone
What are the actions of iliacus?
flexion at hip joint
What are the actions of gluteus maximus?
extends hip against resistance
assists in external rotation at hip jt
helps stabilize knee jt in ext via IT band
extends trunk when hip is flexed
assists in abduction of hip
What are the actions of gluteus medius?
abduction of the hip
anterior: int. rot. and may assist w/ flex at hip jt
posterior: ext rot. and may assist w/ ext at hip jt
What are the actions of gluteus minimus?
internal rotation
assists w/ ABD at hip jt
What are the actions of TFL?
assist flex, ABD, med. rot. at hip jt
assist in stabilizing knee in ext
What are the actions of piriformis?
external rotation at the hip
assists w/ ABD of hip when flexed to 90 degrees or greater
What are the actions of superior gemellus?
external rotation at hip jt
What are the actions of obturator internus?
external rotation at hip jt
What are the actions of inferior gemellus?
external rotation at hip jt
What are the actions of quadrator femoris?
external rotation at hip jt
What are the actions of obturator externus?
external rotation at hip jt
What are the actions of levator ani?
straightens rectum to allow passage of stool
